The zero brand seems to have been retired, and both "no sugar" and "light" use sucralose + acesulfame-K as sweetener (that's also the case for the US "diet coke with splendaā€¯ I mentioned, I mistakenly said it contains aspartame).
It seems, however, that in other countries both "no sugar" and "diet" contain aspartame + acesulfame-K (and cyclamate in some cases, but it's forbidden in some countries).
The zero brand seems to have been retired, and both "no sugar" and "light" use sucralose + acesulfame-K as sweetener (that's also the case for the US "diet coke with splendaā€¯ I mentioned, I mistakenly said it contains aspartame).
https://www.coca-cola.com.sg/brands/coca-cola/coca-cola-no-s...
It seems, however, that in other countries both "no sugar" and "diet" contain aspartame + acesulfame-K (and cyclamate in some cases, but it's forbidden in some countries).